6428083607581 has 2 divisors, whose sum is σ = 6428083607582. Its totient is φ = 6428083607580.

The previous prime is 6428083607531. The next prime is 6428083607593. The reversal of 6428083607581 is 1857063808246.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5885112105625 + 542971501956 = 2425925^2 + 736866^2 .

It is a cyclic number.

It is not a de Polignac number, because 6428083607581 - 2⁹ = 6428083607069 is a prime.

It is a super-2 number, since 2×6428083607581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6428083607531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3214041803790 + 3214041803791.

It is an arithmetic number, because the mean of its divisors is an integer number (3214041803791).

Almost surely, 2^{6428083607581} is an apocalyptic number.

It is an amenable number.

6428083607581 is a deficient number, since it is larger than the sum of its proper divisors (1).

6428083607581 is an equidigital number, since it uses as much as digits as its factorization.

6428083607581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 6428083607581 in words is "six trillion, four hundred twenty-eight billion, eighty-three million, six hundred seven thousand, five hundred eighty-one".